Honestly I have no explanation for this fork. It has mounts for canti's/V's and disc brakes. Also a 1" steerer tube. I have XT canti's on it. It handles much better than the Mag21.
V brakes give less clearance to wide tires. Deflate and inflate after remove a front wheel. Just yesterday i took the bike off the car, put wheel back and pedaled in a hurry; can´t do that on v brakes so no deal